Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Osmoregulation in Insects01:47

Osmoregulation in Insects

Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area.
Background and Environment Affect Phenotype02:27

Background and Environment Affect Phenotype

Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
Morphogenesis02:19

Morphogenesis

Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
The Ratio of X Chromosome to Autosomes02:45

The Ratio of X Chromosome to Autosomes

In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.  
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...
Evolution of New Traits in Microbes01:24

Evolution of New Traits in Microbes

Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Phase 3 Results of Bepirovirsen Treatment for Chronic Hepatitis B Virus Infection.

The New England journal of medicine·2026
Same author

Efficacy, Safety, and Cost-Effectiveness of Reduced versus Full Initial Doses of Androgen Receptor Signaling Inhibitors in Non-Metastatic Castration-Resistant Prostate Cancer: A Multicenter Retrospective Study.

The Prostate·2026
Same author

The Relevance and Resilience of Evo-Devo in 2025: The Biennial Meeting of the Pan American Society for Evolutionary Developmental Biology.

Journal of experimental zoology. Part B, Molecular and developmental evolution·2026
Same author

Regulation of metamorphosis in holometabolous insects.

Current opinion in insect science·2026
Same author

Retreatment of Direct Acting Agents (DAAs) After Initial DAA Failure in Hepatitis C Patients.

Hepatology research : the official journal of the Japan Society of Hepatology·2026
Same author

Significance of Measuring Interferon-γ-Induced Protein-10 Levels in Patients Receiving Systemic Therapies for Unresectable Hepatocellular Carcinoma.

Oncology·2026

Related Experiment Video

Updated: May 27, 2026

Protocols for Visualizing Steroidogenic Organs and Their Interactive Organs with Immunostaining in the Fruit Fly Drosophila melanogaster
12:10

Protocols for Visualizing Steroidogenic Organs and Their Interactive Organs with Immunostaining in the Fruit Fly Drosophila melanogaster

Published on: April 14, 2017

Juvenile Hormone and the Evolution of Insect Metamorphosis.

James W Truman1,2, Yuichiro Suzuki3, Lynn M Riddiford1,2

  • 1Friday Harbor Laboratories, University of Washington, Friday Harbor, WA 98250, USA.

Integrative and Comparative Biology
|May 25, 2026
PubMed
Summary

Juvenile hormone (JH) evolved from regulating insect embryogenesis to controlling postembryonic development and metamorphosis. Its changing roles reflect the increasing complexity of insect life histories and gene regulation.

More Related Videos

Methods to Test Endocrine Disruption in Drosophila melanogaster
09:43

Methods to Test Endocrine Disruption in Drosophila melanogaster

Published on: July 3, 2019

Rearing and Double-stranded RNA-mediated Gene Knockdown in the Hide Beetle, Dermestes maculatus
09:57

Rearing and Double-stranded RNA-mediated Gene Knockdown in the Hide Beetle, Dermestes maculatus

Published on: December 28, 2016

Related Experiment Videos

Last Updated: May 27, 2026

Protocols for Visualizing Steroidogenic Organs and Their Interactive Organs with Immunostaining in the Fruit Fly Drosophila melanogaster
12:10

Protocols for Visualizing Steroidogenic Organs and Their Interactive Organs with Immunostaining in the Fruit Fly Drosophila melanogaster

Published on: April 14, 2017

Methods to Test Endocrine Disruption in Drosophila melanogaster
09:43

Methods to Test Endocrine Disruption in Drosophila melanogaster

Published on: July 3, 2019

Rearing and Double-stranded RNA-mediated Gene Knockdown in the Hide Beetle, Dermestes maculatus
09:57

Rearing and Double-stranded RNA-mediated Gene Knockdown in the Hide Beetle, Dermestes maculatus

Published on: December 28, 2016

Area of Science:

  • Insect developmental biology
  • Evolutionary endocrinology
  • Molecular genetics

Background:

  • Insect life histories have evolved significantly, impacting developmental processes.
  • Juvenile hormone (JH) plays a crucial role in regulating insect development.
  • Understanding JH's evolutionary trajectory is key to deciphering insect diversification.

Purpose of the Study:

  • To trace the evolutionary changes in the function of juvenile hormone (JH) across different insect life histories.
  • To elucidate the role of JH in embryogenesis, incomplete metamorphosis, and complete metamorphosis.
  • To connect JH's evolving functions with key regulatory genes (chinmo, broad, E93).

Main Methods:

  • Comparative analysis of JH function in basal (non-metamorphic) and derived (metamorphic) insect species.
  • Examination of JH's role in embryogenesis, nymphal wing development, and pupal formation.
  • Discussion of JH's interaction with major genes controlling insect life histories.

Main Results:

  • In basal insects, JH is primarily involved in embryogenesis.
  • In insects with incomplete metamorphosis, JH maintains the juvenile form and promotes wing pad growth.
  • In insects with complete metamorphosis, JH prevents morphogenesis during larval and pupal stages, with a specific peak during pupa formation.

Conclusions:

  • The function of juvenile hormone (JH) has evolved significantly throughout insect evolution, adapting to increasingly complex life histories.
  • JH's roles shifted from embryonic development to postembryonic development, including metamorphosis.
  • The evolution of JH function is intertwined with the regulation of key developmental genes.